Examples of RAT

The teacher knows what we did, which means that somebody ratted.

First Known Use of RAT

1812

rat

noun\ˈrat\(Medical Dictionary)

Medical Definition of RAT

: any of the numerous rodents (family Muridae) of Rattus and related genera that differ from the murid mice by their usually considerably larger size and by features of the teeth and other structures and that include forms (as the brown rat, the black rat, and the roof rat) which live in and about human habitations and in ships, have become naturalized by commerce in most parts of the world, and are destructive pests consuming or destroying vast quantities of food and other goods and acting as vectors of various diseases (as bubonic plague)